Jens "Jeb" Bergernstern, Minecraft's lead designer, announced that the new version of Minecraft will allow mobs, the game's creatures, to move back and forth through Nether portals, the gateway that allows players to move back and forth between Minecraft's starting "overworld," and the hellish "Nether."
So, if a chicken, for whatever reason, goes in through a portal on the overworld, it's coming out into the Nether, and will probably end up laying more than just eggs.
At the moment, only players can engage in the Stargate like behavior of inter-dimensional travel, but that will all change with the next patch.
Teriffic. So not only do you have to worry about building a homely hut to stay safe from zombies, skeletons, and creepers, now you'll have to make sure that your portal is shut down, or far away from your safety shack, lest you want ghasts, blazes, zombie pigmen, and magma cubes over for dinner.
There's also more changes on the way, which you can read below, courtesy of Mojang's weekly snapshot.
- Added item frames
- Added cobblestone walls (yes, mossy too)
- Maps now align to a grid, making it easier to create adjacent maps. Maps can also be cloned
- Stairs now auto-arrange into corners. This is a test and may change based on feedbac
- Leather clothes can be dyed
- Removed the "wip block" from the creative menu
- Added two new crops and associated items
- F3+P will toggle the auto-pause when the window loses focus (it's for debugging, mainly)
- F3+H will toggle detailed item descriptions (also for debugging)
- Added arrow-sensitive wooden buttons
- Trapdoors can be placed in top-most position (based on cross-hair aim)